Preparation

Preheat a grill to medium-high. Arrange the onions on the grill (reserve marinade). Grill, turning once, until softened and lightly charred, 8 to 10 minutes. Return the onions to the marinade, cover with plastic and let stand 10 minutes.

Toss the pine nuts and raisins with the onions; season with salt and pepper. Garnish with the remaining 2 tsp. oregano.